Drive of machines for casting stereotype plates



Dec. 11, 11934- K. SCHAEFLEIN 3 ,8

DRIVE OF MACHINES FOR CASTING STEREOTYPE PLATES Filed Oct. 24, 1932 2 Sheets-Shet l Dec. 11, 1934. K, SCHAEFLEIN 1,983,814

DRIVE OF MACHINES FOR CASTING STEREOTYPE PLATES Filed 001;. 24, 1932 2 Sheet-Sheet 2 flar/ iga vem y 7 r Patented Dec. 11, 1934 srrs innit DRIVE OF MACHINES .FOR CASTING STEREOTYPE PLATES Karl S'chaeflein, Bern, Switzerland 4 Claims.

The invention relates to the drive of a machine for casting stereotype plates, and for backing electros, of the .kind in which the mold, for each casting operation, is pressed against an outlet opening of the melting pot, and a valve, or the like, provided on the melting pot, is opened and closed.

According to the invention the opening and closing or" the valve, and all the movements of the mold, are carried out by means of a swinging toothed segment, which is operated by cams and moves, the valve directly by a connecting rod, or the like, and the mold through a second toothed segment which it drives in known manner.

Compared with existing devices this drive has the advantage of great simplicit because, for the purpose of carrying out the various movements, neither a timing gear, nor a continuously rotating large toothed wheel is required, so that all parts can run in a closed oil bath.

In the accompanying drawings two constructions of the new drive are shown,

Fig. 1 being a diagrammatic side elevation of parts of a casting machine, in the casting position, together with the drive,

Fig. 2, a plan of the drive alone,

Fig. 3, a side elevation similar to Fig. 1 showing the outlet opening of the melting pot just closed, and the mold moved away from the melting pot, but still closed,

Fig. 4, a side elevation of the casting machine showing the outlet opening of the melting pot completely closed, and the mold open,

Fig. 5, a side elevation of the second construction.

The mold, consisting of the core a and mantle h, in the casting position, immediately adjoins the outlet opening 0 of the melting pot d (Fig. l), which opening is opened and closed by the valve cock e. After the plate has been cast the cock e is closed and the mold is moved away from the melting pot into the position shown in Fig. 3, in order to better cool the cast plate by the water flowing through the core and mantle in known manner, without a direct contact of the mold with the hot melting pot. The mold is then opened (Fig. 4), and the cast plate 1, which hangs from the top edge of the core in known manner, is lifted out of the machine.

In order to obtain these movements of the valve e and mold a, b automatically, the worm shaft h is connected with the motor 2' by means of the known clutch g. The worm then drives, through the agency of the worm-wheel k and of the spur-wheels l, m, the two cams n, 0 until they have described a full revolution, whereupon the clutch g is put out of gear in known manner, so that the drive is. stopped.

By the rotation of the cams n, 0 the toothed segment 10 is swung up and down. For this purpose the segment 10 is provided with arms carrying rollers q, 1" which run on the respective cams n and 0. The segment p is connected with the valve 6 by the connecting rod 5, while its teeth mesh in a second toothed segment i, which, by means of a crank u and connecting rod 1;, presses the mantle b against the core a, and then moves both parts towards and against the melting pot d, or it moves these parts in the opposite direction.

Beginning in the position of the parts shown in Fig. 4, in which the mold parts a, b are open, and the valve e is closed, the clutch g is closed, whereupon the toothed segment 22 is brought by the cam 11 first into the intermediate position shown in Fig. 3, and then into the position shown in Fig. l, the valve e being thus completely opened by the connecting rod 3. At the same time the toothed segment t is moved by the toothed segment p, and thereby the mantle h is pressed first against the core a (Fig. 3) and then both core and mantle are pressed against the melting pot d (Fig. 1). In this closed position the mold (a, h) and the valve e remain, until the cam n has described half a revolution, whereaiter the declining part n of the cam it permits the segments 10 and t to move into the position shown in Fig. 3. By the simultaneous closing of the valve 6 the upper edge of the cast plate is separated from the contents of the melting pot, and the mold (a, b) is moved somewhat away from the melting pot. In this position the mold is kept by the part 12 of the cam 12, until the declining part n of the cam allows the toothed segments p and t to move into the position shown in Fig. 4, in which the valve e further overlaps the outlet opening 0 and the mold is opened. By the second cam 0 the toothed segment p is swung down, so that the cams n and 0 together move the toothed segment p in both directions.

In the construction shown in Fig. 5 both cams n, o are combined on one disc; otherwise this construction corresponds to that shown in Figs. 1 to 4.

What I claim and desire to secure by Letters Patent of the United States is:-

1. In a drive for a machine for casting stereotype plates, and for backing electros, comprising in combination a melting pot having an outlet below the level of the molten metal, a valve adapted to open and close the outlet in said pot, a mold adapted to be moved towards and away from said pot and to be opened and closed, a toothed segment having oppositely disposed arms, a roller on each arm, a rotary camming element adapted to alternately contact with the rollers on the arms to oscillate the toothed segment, means connecting said toothed segment with said valve, a second toothed segment meshing in said first toothed segment, and means connecting said second toothed segment with said mold.

2. In a drive for a machine for casting stereotype plates, and for backing electros, comprising in combination a melting pot having an outlet below the level of the molten metal, a valve adapted to open and close the outlet in said pot, a mold adapted to be moved towards and away from said pot and to be opened and closed, a swinging toothed segment adapted to operate said valve and said mold, said segment being provided with oppositely disposed bearing arms, and. a rotary cam operatively associated with each arm to alternately oscillate said segment.

3. In a stereotype plate casting machine, the

combination of a melting pot having a valved outlet leading therefrom, a mold adapted for movement toward and away from said valved outlet, rotary actuated cam means having two operative cam surfaces, a toothed segment provided with means in constant engagement with said cam surfaces for oscillating said segment, a connection between said segment and the valved outlet, a second toothed segment in mesh with the first toothed segment and a connection between the second segment and the mold.

4. In a stereotype plate casting machine, the combination of a melting pot having a valved outlet leading therefrom, a mold adapted for movement toward and away from said valved outlet, rotary actuated cam means having two operative cam surfaces, a toothed segment provided with means operatively associated with said cam surfaces for oscillating said segment, a connection between said segment and the valved outlet, a second toothed segment in mesh with the first toothed segment and a connection between the second segment and the mold.

KARL SCHAEFLEIN. 

